java读取文件路径的几种方法，java 的Class中获得相对路径，绝对路径的方法
System.out.println("***********************");File file = new File(".");System.out.println(file.getAbsolutePath());// D:\fsoft\nchome_huaxin\.try { System.out.println(file.getCanonicalPath()); // D:\fsoft\nchome_huaxin} catch (IOException e) { e.printStackTrace();}System.out.println(file.getName());// .System.out.println(file.getParent());// nullSystem.out.println(file.getParentFile());// nullSystem.out.println(file.getPath());// .System.out.println("***********************");System.out.println("=========================");System.out.println(Thread.currentThread().getContextClassLoader().getResource(""));// file:/F:/share/JavaProject/NC_HUAXIN_SALE/out/public/System.out.println(DownloadImpl.class.getClassLoader().getResource(""));// file:/F:/share/JavaProject/NC_HUAXIN_SALE/out/public/System.out.println(ClassLoader.getSystemResource(""));// file:/F:/share/JavaProject/NC_HUAXIN_SALE/out/public/System.out.println(DownloadImpl.class.getResource(""));// file:/F:/share/JavaProject/NC_HUAXIN_SALE/out/private/nc/impl/hxsale/String url = DownloadImpl.class.getResource("").getFile();File file1 = new File(url);System.out.println(DownloadImpl.class.getResource("/"));// (Class文件所在路径)file:/F:/share/JavaProject/NC_HUAXIN_SALE/out/public/System.out.println(new File("/").getAbsolutePath());// D:\System.out.println(System.getProperty("user.dir"));// D:\fsoft\nchome_huaxinSystem.out.println("=========================");
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